30247 Patek Philippe 5102J Celestial Sky Chart Grand Complication, 5102J-001, 5102J001, very rare with roughly 200 examples made in yellow gold, the 18k yellow gold case is in exceptional original condition retaining its original finish and shape, the sides of the case have been hand engraved by the masterful Patek Philippe artisans, original 18k yellow gold buckle, automatic Patek Philippe Cal. 240 LU CL movement, the watch has a full sky chart, phases and orbit of the moon as well as the time of the meridian passage of Sirius and the Moon, the Patek Philippe engineers researches 25 trillion different astrological combinations proving the complexity of this complication, white pierced hands gives contrast against the dial, sapphire crystal, display back, size 43mm, Like New with original leather binder and original certificate that is dated October 2008.